/*
Copyright 2022.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package main

import (
	"flag"
	"os"

	// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
	// to ensure that exec-entrypoint and run can make use of them.
	_ "k8s.io/client-go/plugin/pkg/client/auth"

	"k8s.io/apimachinery/pkg/runtime"
	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/healthz"
	"sigs.k8s.io/controller-runtime/pkg/log/zap"

	istioscheme "istio.io/client-go/pkg/clientset/versioned/scheme"

	submarineapacheorgv1alpha1 "github.com/apache/submarine/submarine-cloud-v3/api/v1alpha1"
	"github.com/apache/submarine/submarine-cloud-v3/controllers"
	//+kubebuilder:scaffold:imports
)

var (
	// Flags generated by operator-sdk
	metricsAddr          string
	enableLeaderElection bool
	probeAddr            string

	// sigs.k8s.io/controller-runtime provides the --kubeconfig flag
	// Only required if out-of-cluster.
	// If set, will use the kubeconfig file at that location.
	// Otherwise will assume running in cluster and use the cluster provided kubeconfig.
	// kubeconfig string

	// Flags of submarine
	clusterType             string
	createPodSecurityPolicy bool
)

// Used for "source" field of events. Appears in the "FROM" column of `kubectl describe`
const controllerAgentName = "submarine-controller"

var (
	scheme   = runtime.NewScheme()
	setupLog = ctrl.Log.WithName("setup")
)

func init() {
	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(istioscheme.AddToScheme(scheme))

	utilruntime.Must(submarineapacheorgv1alpha1.AddToScheme(scheme))
	//+kubebuilder:scaffold:scheme
}

func main() {
	// Setup flags
	// Flags generated by operator-sdk
	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	// Flags of submarine
	flag.StringVar(&clusterType, "clustertype", "kubernetes", "K8s cluster type, can be kubernetes or openshift")
	flag.BoolVar(&createPodSecurityPolicy, "createpsp", true, "Specifies whether a PodSecurityPolicy should be created. This configuration enables the database/minio/server to set securityContext.runAsUser")

	opts := zap.Options{
		Development: true,
	}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                 scheme,
		MetricsBindAddress:     metricsAddr,
		Port:                   9443,
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "5d52732c.submarine.apache.org",
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	if err = (&controllers.SubmarineReconciler{
		Client:                  mgr.GetClient(),
		Scheme:                  mgr.GetScheme(),
		Recorder:                mgr.GetEventRecorderFor(controllerAgentName),
		Log:                     ctrl.Log.WithName(controllerAgentName),
		ClusterType:             clusterType,
		CreatePodSecurityPolicy: createPodSecurityPolicy,
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "Submarine")
		os.Exit(1)
	}
	//+kubebuilder:scaffold:builder

	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up health check")
		os.Exit(1)
	}
	if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up ready check")
		os.Exit(1)
	}

	setupLog.Info("starting manager")
	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}
